North of Four Marks clockwise. Most of this is off road. I hardly saw a sole for the whole ride. Some of the byways were so rutted in parts as to require a bit of pushing, but most were very rideable. Although not too hilly, there were some short sharp climbs and some good singletrack-like sections here and there. This ride is tougher than you might think - I had jelly knees by the end of it.